Core box



PatentedApr. 28, 1925,

OLOF SKEPPSTEDT, 0F MOLINE, ILLINOIS.

CORE BOX;

Application filed November To all whom it may concern;

Be it known that I, OLOF Snnrrsrnnr, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Core Boxes, of which the following is a specification. I

My invention pertains to core boxes, and it is specially designed for use in connection with a core making machine which is forth in Letters Patent of the United States No. 1,&l7,577, issued to myself May 30th, 1922. Embodied in said machine were certain vibratory members by thefaction of which the cores are separated from the molds of the core boxes, such members being automatically set in motion upon the core-box being placedin proper position for the act on of said members thereon, In said ma chine a table was provided for the support of the core-box, but said table was not fitted with any means to prevent movement ,of said core-box transversely and tiltingly with relation to the table of the machine while being operated upon. In practice it has been discovered that there is danger of such trans.- verse or tiltable movement of the core-box, ,due to the vibratory action thereof, resulting ininjnry to thecores. It is not found to be feasible to provide the table of the machine with guiding devices, on account of the great variation in the shape and form of different core-boxes. The chief purpose of this invention is to provide a means for quickly locating the core-box on the table of the machine in relation to the vibratory devices thereof, and also provide said core-box with a means for guiding and holding the box in line during the drawing operation while the core box is being removed from the cores.

A further purpose is to provide a means for relatively locking the core-box in position during the drawing operation and while it is being acted upon by the vibratory devices or members.

A further purpose is to provide core-boxes ofa relatively greater height with means for preventing their angular ortllting displacement relative to the table of the machine. Such means prevents one end of thebox being lifted or drawn faster than the other end thereof without exerting undue effort. It also prevents the core-box from being tilted toward or away from saidvibratory members.

The above named purposes are secured by is, 922. Serial No. ceases.

providing the edge or edges of the core-box with means for c-o operating with the vibra tory members of the'machine, while said mach ne in operation, which means are capable of being instantly engaged or disengaged. from said vibratory members. i,

In the drawings Fg. tie a plan view of a core-making machine, w'ith a core-box in position thereon. V Fig. 2 a sine view of .a core-box of usual construction. Y i

Fig. 3 is a horizontal section on the broken line 33 of Fig. 2.

The reference number 1 indicates the table of a machine, such as is fully shown and set forth in Said patent, said '7 are supported vibratory bars 3, united by a cross-piece 4:. Said cross-bar is adapted to receive a vibratory movement from a member 5, actuated through atube 6 from-a valve-chamber 7. 8 is a slidable contact member operatively connected with the valve-chamber 7, in a manner not shown in the drawings herein, and capable of impartingmovement to the vibratory elementsupon a force being exerted against the same, as by the core-box.

9 represents the upper plate-of acore-box, and 10 the base-plate, said plates being united by a plurality of molds 11, in which the cores are formed, The edges of the plates 9 and 1 0 are in approximate alignment, and said edges are provided at a central point with recesses 12, for engagement with the member 8, and at the sides thereof with 'recesses 13, to accommodate the bars 3. The core-box can be provided with said recesses at one or both of its sides, as desired, but if table being pro; vided with brackets 2, in the ends of which only fitted therewith on one side, that side must necessarily always be turned towardthe active members of the machine. The matter of duplication of said recesses on the opposite side of the core-box is simply a matter of convenience in positioning such box in the machine.

The inner edge of the recess 12 is slightly in advance of that of the recesses 13, permitting-a slight movement of the box after such recess is engaged, before a contact is formed between the bars 3 and recesses 13. This movement is suflicient to permit of the vibratory devices being set in motion. In core-boxes of a comparatively greater height it is necessary to have a top plate 9 and a base-plate 10, and to provide each of these plates with the recesses 12 at a central point and recesses 13 co-operating with the bars 3. When the box is so constructed there is a locking action produced that is greater in boxes of a greater height and practically absent in the shallower boxes. This locking action prevents the tilting of the box toward or from the bars 3 and also prevents the box from assuming an angular position relative to the line of draw to be followed. In other core-boxes that are comparatively shallow this locking action is not required, because the draw is short and the skill of the operator is suiticient to prevent any detrimental tilting of the core-box during the drawing operation. It is therefore sufficient to use one plate and provide the same with the necessary recesses.

.llre operation of the device will be apparent. Vith the members 3 and recesses 13 in engagement, there will be no possibility of the core-box being shaken out of position laterally while the vibratory operation is proceeding. It will also be seen that the engagement of these parts is accomplished by the usual movement of the core-box into position to be acted upon, and that said parts are readily released upon the removal of the core-box. The recesses 12 are of sufficient length to permit a limited longitudinal movement of the core-box, when being positioned in' the machine.

In the use of the core-boxes, it is customary to form the cores therein on a bench or table, and then place them in the machine in an inverted position, so that the box can be lifted from the cores, after the same have been loosened. The core-box is shown in Fig. 2 in such an inverted position.

It will be evident that changes can be made in the form and arrangement of the novel features of the device, without departing from the scope of the invention, as set forth and claimed herein.

What I claim, and'desire to secure by Letters Patent, is; v

1. In combination with a core-making machine, provided with vibratory members, and means for setting said members in action upon contact of a core-box therewith, a core-box having a plate provided in its edge with recesses conforming to the shape of said vibratory member, and adapted for engagement therewith, to assist in positioning the core-box in the machine, and to hold the core-box from a lateral or tilting movement while the same is being drawn from the cores.

2. In combination with a core-making machine, provided with vibratory members, and an active element for setting said members in operation, upon contact of a corebox therewith, a corebox having parallel plates provided in their edges with corresponding recesses adapted for engagement with said vibratory members, and additional recesses for engagement with said active element, said last-named recesses being of relatively less depth than said first-named ones.

3. In combination with a core-making machine embodying vibratory devices, having members capable of transmitting a vibratory movement to a core-box positioned on said machine. a core-box having recesses to cooperate with said vibratory members, said recesses serving as a locking means for the core-box, furnishing a lateral locking arrangement for the core-box, and preventing lateral displacement resulting in the ruining of the core or cores.

In combination with a core-making machine embodying vibratory devices, hav ing members capable of transmitting a vibratory movement to a core-box positioned on said machine, a core-box having suitable recesses to co-operate with said vibratory member, said recesses serving as a locating, guiding, and laterally locking means prior to and during the drawing operation, and further serving to hold the box against a tiltable movement out of the true line of draw.

In testimony whereof I aiiix my signature.

OLOF ,SKEPPSTEDT. 

